5 days in Switzerland - Need some ideas

I have made the following itenerary for the five days. Let me know if this is doable:

27 Oct - Paris-Zurich-Interlaken (Overnight at Interlaken)
28 Oct - Visit Jungfrau and back to Zurich at night. If the weather is not good at Jungfrau, then we'll just spend the day at Interlaken and go back to Zurich for night stay. (Had already booked the hotel for next four days in Zurich at good discount, so made Zurich our base for the rest of the trip).
29 Oct - Zurich - Lucern - Titlis or Pilatus based on the weather
30 Oct - (NEED some suggestions for this day)
31 Oct - Zurich city and Rhine falls
1 Nov - Zurich to Paris train
I was thinking of taking the 4 day Swiss Pass for the first four days. Based on our itenerary, what is not covered in the Swiss Pass?
Also, we will be traveling with our 2.5 year old daughter. And we would be carrying a stroller with us - would it be conveninet to carry it around at all these places?

Hello anuja, and welcome to the forum. The 4 day Swiss Saver Pass might be a good option. If you want to profit from discounts or free traveling on the last two days as well, you may also consider a 3 or 4 day Swiss Saver Flexi Pass. Free travel days can be used for October 27 and November 1, and one or two days in between on which you plan rather long and expensive trips, such as October 28 and 29. On both the detail page of the Swiss Pass and the Swiss Flexi Pass you'll find a map showing exactly which routes are covered and which are discounted. Generally, regular trains are for free, and cable cars and mountain trains are discounted by 50% (the Jungfraujoch train is discounted by 25% from Wengen/Grindelwald).

In most cases it's no problem to travel with your child and your stroller.

As for October 30: there are many possibilities. Consider a boat trip over lake Lucerne or lake Zurich for example. Zurich itself has lots to offer as well (musea, a great old town centre, the lake, and so on). Broswing this forum may help you to collect some more ideas.