This is a simple game for teaching children about tens and units. I use counters and you can use cubes or anything as long as ten of them will fit in a column on the sheet. As soon as the units (or ones) column has ten or more, they have to move those ten to the tens column. Continue until the first person reaches fifty. I've included a set with units vocabulary and a set with ones vocabulary depending on which you use. I've extended it to race to one hundred and race back down to zero.