Play fun games and activities and count in 2's.
Sort socks in pairs, in a line and count in 2's.
You could do this with shoes or gloves too.
Write the numbers on lollipop sticks or pieces of card and then sequence them in order. You could make 2 sets and race to see who can put them in order first.
This could be turned into a treasure hunt, hide the sticks and go and find them before placing them in order.
Write the numbers in chalk and jump or hop on them as you chant them.
Create a board with chalk for your child to have to choose the next number in the sequence to jump onto and shout the number out as they land on it.