Worth to buy 7 days JR pass?

Hello! I would like to know if the 7 days Whole Japan Railpass is worth it for 2 adults, one 8 yrs old with this itinerary:

Day 1: Narita Airport to Tokyo station
Travel to Harajuku, Shinjuku Day 2: Tokyo station to/fro Puroland
Day 3: Within Tokyo - Ueno, Asakusa
Day 4: Within Tokyo - Disneyland
Day 5: Tokyo to Hakone to Odawara
Day 6: Travel within Hakone
Day 7: From Hakone (Odawara) to Osaka
Day 8: Osaka
Day 9: Osaka to Nara (day trip)
Day 10: Osaka
Day 11: Depart Kansai Intl

I also have a 3 year old, but is it correct that they do not require a ticket at this stage?

Looking forward to your kind advice.

Thanks,
Grace