Cut an apple and ask your child to guess how many seeds they think will be inside. Or how many pieces of orange there will be after you peel it. Count the seeds or segments together and compare that number with their guess. What other foods can you use for this game?
See what your child is learning
Your child is thinking like a scientist. Making a guess, looking at the results, and then comparing the two is just what a scientist does. Your child is also learning to estimate numbers. This is an important skill for math.