Talk about numbers your child can see in the environment around them and why they are there - letterbox numbers, birthday cards, shopping aisles, clocks/time etc
Create patterns using blocks, cars, pegs, counters etc
Play with money
Discuss the weather
Talk about the concept of half of something with your child
Get your child to practice sharing things with their friends and/or siblings
Play board games, card games and dice games (make sure your child DOES NOT always win and DOES NOT always go first)
Use timers to encourage your child to do an activity within an appropriate amount of time
Cook with your child
Talk about numbers your child can see in the environment around them and why they are there - letterbox numbers, birthday cards, shopping aisles, clocks/time etc