Show your child the objects. Then have your child close their eyes and turn around.
Hide one object under a blanket. Have your child open their eyes and ask them which object is missing.
Repeat by hiding the other objects. Try hiding each object more than once, but in a different order.
Then, try hiding two objects.
As skills advance, increase the number of hidden objects to 4 or 5 plus.
Note: I know this seems simple, but it really helps to build the skills of concentration and attention to detail.
TIP: I like to play this game while waiting for the food at restaurants! (Use the forks, spoons, salt shakers etc.) The children can even take a turn to hide the object.