We picked apples, then used the opportunity to count by tens (big apples) and ones (little apples). Ten little apples equals one big apple. I call out a number between one and a hundred and the kids have to represent the number (for example, 73 is seven big apples and three little ones). Having done this all week, with beans, coins and even sounds, the kids made quick work of it. Best of all, the learning is tied into their senses.