I have made this design for me and my friend when we are playing munchkin. there are no things like this to buy so i designed this one. 

Assembly:

make sure the arrow on the back pate is facing upwards in the right corner. 

on the backside of the wheels is a L or R. place them Left or Right.

Glue the front plate to the back plate with the 4 pins that don't have a wheel on it.

Let it dry for 5-10 min

And happy counting !