Food for Ants is one of the most exciting science activities for 7-year-olds that can put them right in the middle of an unknown world. Work with your kids in figuring out a location nearby that has a resident anthill. Carry along a bunch of tiny food items of varying kinds, such as salt, sugar, honey, shredded fish, and so on. Ask him to note down how quickly do the ants find the food item and how long do they take to finish it up.
Your kids might be too young to do the crossword themselves. But they can read the words aloud for sure. Use a solved crossword puzzle. You can refer to the number within the crossword puzzle and ask your child to read that specific word. If he is weak at reading, he can spell out the letters first and then say the word.