Plan a switzerland trip

Going up to the top of the Junfrau is pretty much an all day experience, although if you went very early you may have time to also see trummlebach falls. I'm not sure what you mean by the First cliff walk. If you are talking about the ridge hike between First and Schynige Platte then that is a minimum 6 hour hike, plus the time to get to and from makes it an all day affair. I can't imagine you would have time for anything else. Sorry I can't comment on Lucerne as I prefer to spend my time in Switzerland in the Berner Oberland.

...Lucerne, which I have learnt from the forums to be very scenic.

Just back from Switzerland but only visited the Zurich Airport to Luzern part of your proposed trip. Just take the train from Zurch Airport (which goes through Zurich) to Luzern. My several train journeys in Switzerland were all scenic. With the exception of short stretches through the industrial/commercial portion of Zurich, the train runs through scenic country. And rural Swiss farmers do not seem to collect a dozen or more derelict vehicles to decorate their farm yards.

Regarding the rail passes, usually the Half-Fare Card (HFC) is the most economical option. Since you have children in your group, be sure to get a free Swiss Family Card when you buy your HFCs in Switzerland. This will allow the kids to ride free as long as they are with you.

Don't forget the luge ride at Mt. Titlis. The kids will love it!

The trails around First may not be open in May, depending on how much snow they've had this winter (I think it has been below normal this year). Check with your hotel in Wengen about the status of various hiking trails in the area.

saylikawalee,
Keep your plans for the Jungfrau flexible. If the weather is bad, go on a different day.

proceed to wengen directly from Zurich. please tell me the route it would take if I opt to go via Lucerne, which I have learnt from the forums to be very scenic.

On Day 4 you are going from Wengen to Luzern, presumably via the scenic Brünig Pass route. So there is no point in going that way on your way from the airport to Wengen, just take the quickest route. If you go to the Swiss Railways site ( http://www.sbb.ch/en/home.html ), and enter Zurich airport to Wengen, plus date and time. It will find you the quickest route. This will cost CHF 44.70 with a ½ price card, or CHF 89.40 full price. These are the prices you will pay at the airport station.

Day 5 : we leave from Lucerne to Zurich and take flight to paris.

Why not take the train to Paris? nearly as quick and a lot more comfortable. For example:

Luzern dep 10:54, Basel SBB arr 11:55
Basel SBB dep 12:34, Paris-Gare de Lyon arr 15:46

Hi.
Wowww. This detailed information would be a great help. How much a train ride from Lucerne to Zurich cost with half card?.

Luzern to Zürich Flughafen: 2 trains per hour, trip takes between 1h03 and 1h07. Cost CHF 15 with half price card, full fare CHF 30

This info is all on the Swiss railways website: http://www.sbb.ch/en/home.html

Take the train from Zurich to Paris. It will be much easier and much more enjoyable. Look at www.sbb.ch for train schedules.

thank you all for responses. however, when I was checking the ticket price from Luzern to paris, train was showing the cost more than the airfare ,so I already booked flight . moreover I thought, 6 hours journey by train would be tiresome as we have 3 year old kid along.

It's too late if you have booked the flight already. But:
Luzern to Paris is 4h50 by train:

Luzern depart 08:54, Basel SBB arrive 09:55
Basel SBB depart 10:34, Paris-Gare de Lyon arrive 13:43

So that is < 5 hours in a comfortable train, where your 3-year-old can move around freely, eat and drink, and go to the toilet at any time.
Versus 1 hour to Zürich airport + 90 minutes check in + 1 hour flight + 30 minutes (at least) to get off plane and pick up luggage, + 1 hour into Paris = 5 hours (at least), with a lot less comfort and freedom of movement.

Trummelbach falls has a minimum age. I don't remember what it is. Our 2yr old was too young so we opted not to go. FYI. It is very loud. Not a bad walk for someone to stay outside while the rest of the groups goes inside.

Thank you very much all of you to take our time and post the response. It is going to be very useful.
1 more thing i wanted to know, if there is any sort of digital currency app used in Switzerland, so i would not need to carry cash along.

Thank you very much all of you to take our time and post the response. It is going to be very useful.
1 more thing i wanted to know, if there is any sort of digital currency app used in Switzerland, so i would not need to carry cash along.

saylikawalee, Switzerland is more of a cash-based economy than many other European countries. You will need some Franks.
Most large shops and restaurants will take cards, but if you can't see a sign it is better to ask first to be sure. A small food stand or market stall may only accept cash, or there may be a minimum amount for card transactions (for example 10 or 20 Franks).
Some businesses near the border, or in tourist areas will take Euros, but they only take notes (no coins), give change in Swiss Franks and may not give a very good exchange rate.
SBB (Swiss Railways) also take cards and Euros, even in their ticket machines.