Have them place their hand inside the bag and retrieve a coin then have them state what type of coin they have pulled out. Set a timer so they can better their score each time, giving them a discernable goal to reach toward. If more than one child is involved change the rules so that the first person to a certain number wins the game. This not only teaches them coin recognition and counting, but it encourages controlled competition, which helps them to learn to be good losers as well as good winners. Use inventive ways to introduce math without the dread that many associate with learning math.
Word pictures help to solidify what they are being taught.
Games help them to relate math with fun. Bringing it together Be innovative as a parent when teaching your child. The more you involve them and make them an active participant the more pleasure they take in learning. Over-saturation can lead to frustration and an unwillingness to try to learn. If the process of learning is presented in a fun and exciting way the child is more willing to attempt learning and is better able to retain the information.