Not Road Blocks

 Mary spends much of her spare time playing Roblox.

For the longest time I misheard this as Road Blocks- and thought, "That doesn't sound very interesting"....

I envisaged little cars running round a maze-like road system, avoiding pile-ups and fallen trees and the like.

I have since informed myself.

(Get with it, Granddad!)

So what did I have recourse to when I was Mary's age?

Books.

I used to read books.

Setting aside generational prejudice I think the two activities amount to much the same thing. Both could be characterised as escapist and/or stimulating to the imagination. 

Wikipedia describes Roblox as "a universe" of player-generated games- the most popular of which is one in which you grow a garden. 

Sounds like fun.

Ah, to be young again......