Spare coins for Coins for Fisher Price cash box.
3 different kinds for 3 different slots (each coin fits only one).
Cash box model made 1994.
Just print it with flat side down, dense support.
No overhang so you can print it from outside in. If your child is young, you might consider printing PLA since this is less toxic.
The ones in the picture are made from ABS 0.3mm layers, 0.5mm nozzle, 0.5mm width.