Brake Levers for a 2 year old

My little boy is having stopping problems on his balance bike because he can't reach the brake levers.
He is 2 1/2 years old and is really starting to enjoy his Scoot, he is strong enough to handle the bike and can zip along pretty quickly…..Trouble is he can't slow down again, at the moment his preferred method of stopping is ramming into walls.

So I was wondering if anyone knew of any smaller brake levers that I could fit?

I've got some little plastic levers I got off Ebay when my kid was smaller.
They might do the job. Email me if you're interested.

My 2 1/2 year old has perfected the bike/wall interface with great skill.
Currently he's sporting a grazed nose and top lip from the tank slapper and OTB incident whilst mountain biking(walking the dog) in the woods.

replace the reach adjuster grub screws for longer ones. (his levers do have reach adjusters?)

My little girl prefers trees to walls
"Like father like daughter" I guess
Islabikes use Tektro levers so I guess there must be some commonly available