Skip Counting by 6 and Can be used as an outdoor activity where students have to jump, leap, hop, skip etc. through hoops laid on the floor. Students/teacher can write in chalk the starting number on the ground.
I published a post about inexpensive and DIY sandpaper letters, with many ideas that work for sandpaper numerals as well as letters. Here I'll give resources specifically for sandpaper numerals and sandpaper-numeral presentations and extensions.