This link takes you to a site with lots of free downloadable activities for practicing identifying numbers, including dot-to-dot activities, colour by number, and more.
This link takes you to a great website with an explanation of subitizing AKA recognizing quantities at a glance and visually noticing ways to build numbers.
Hopscotch is a great active way to practice writing and identifying numerals.
Roll some dice and build a tower with the number of blocks that matches the number you rolled. How many rolls before your tower falls over?
Play the classic game and mix it up by asking your child to add (e.g. "2 plus 4 o'clock") or by holding up a number card rather than using your voice.
Can you find examples of doubles in your house? For example, a carton of eggs has 6 and 6 (12 eggs all together).