What Generation Features Do You Want Most?

Bikes for kids - I really don't understand why they're adults only at the moment? Feels like a massive oversight, especially considering all that needs to be done to make them work is to scale them down. I'd also like to be able to teach kids to ride a bike, I think that'd be a really fun addition similar to how you can teach toddlers to walk and talk.

Also - strollers for babies/toddlers?, cribs for babies, slides for kids - we have them for toddlers so why not kids?, more kids playground stuff, treehouses, bunk beds, more stuff for toddlers, etc etc