This activity is for children to practice their counting skills and one-to-one correspondence ability.
Take an ice-cube tray, marbles and an ice-cream scooper. Have children place the marbles into the tray. This can be done with partners. One partner using the top row of the tray and the other partner using the other, and have them compare the difference. Or have them count how many spaces they have taken up altogether. Another option is to just give them the items and have them play with them. The advantage here is that the teacher can observe different skills displayed by the children. You will be able to see whether they are counting properly and whether or not they are using one-to-one correspondence. Not to mention they will be using their fine-motor skills. Good luck!!