Kiwi Crate is a monthly subscription box for kids aged 5-8. My GrandKiddo is just 4 1/2 now, but I wanted to get one he'd grow into. (They have different boxes for different ages)
Knowing it was geared a little older than he is, I modified the project. Know your kids, and your timeline when you decide how to modify. I chose to put the frame together the night before, that worked great for us.
I showed him where it was recommended we put the rubber bands, we tried it that way, before he rearranged it all.
He experimented with rolling something besides the marbles that came with. He found a bouncy ball bounces too much, but a plastic gem bead and worked better than I thought it would.
Later in the day, we played a different pinball, on the video game, it's still about how things roll!