Using some number cards 0 - 5 turn them face down so that you can't see the number. Take it in turns with a grown up to turn over a card. What number is it? Can you write that number with your magic pen in the air?
Can you show that many fingers? Can you find a different way of showing that amount on your fingers?
For example 4 can be shown in many different ways, 4 fingers on one hand, 3 & 1, 2 & 2 etc
Using the dot cards see if you can match them to the correct number.