I love Tokyo’s traditional side but the wacky and rainbow wild-side is also a blast. The place to start is , naturally, Harajuku!
Take Purikura in Takeshita Street, Harajuku or at Shibuya 109, Shibuya.
I also highly recommend Team Lab DMM Planets in Toyosu.
Or Team Lab Borderless in Azabudai Hills
The Poop Museum is also great fun for kids between 3-8 year olds.
And, of course, there is the Pokemon Cafe.
If you like this kind of stuff I’m pretty sure you’d also be interested in my “Date night suggestions that scream ‘Yep. I’m in Tokyo‘
For some truly kooky & colourful things to do with kiddies (there are some truly psychedelic options that I wish “big kids” were allowed to do) check out my rainy days with kids post here.