Find containers around the house with different covers, like a pot and a lid, a shoebox and its top, and an empty plastic bottle with a cap. Encourage your child to match the lids with the containers and then to try putting the tops on and taking them off again. As he/she gets better at matching, give him/her more lids and containers.
When your child works to match lids and containers, he/she is focusing, tuning out distractions, and using what he/she already knows to make connections and problem solve. You help your child build these skills when you encourage him/her to test out ideas and come up with his/her own answers.