These on/off discs have large print and braille numbers on them and can be used to do ('sums' lol) maths calculations .
Obviously a child with no sight wouldn't know if they were holding the disc the right way up, to read the numbers in braille.
So I put a nick in the top of each disc and that way the child can orientate the disc and then read the braille successfully.
The board on the right can come off and be used horizontally.
I made this several years ago and it came in this week for a repair.
A couple of discs were missing and I took the opportunity to replace the printed and braille numbers too, so now its good as new again.
At home, I've made more sale-able bits, head huggers and fingerless gloves.
Cold weather here now, so guess gloves will be back in fashion lol