Six items across the screen:
20 kg bag of cement
2 m material
5 l tin of paint
250 g pack of butter
330 ml can of drink,
32 cm trouser leg.
Three boxes below, labelled: length, weight, capacity.
Drag each item to the correct box. If you place it in the correct box, it will stay there. If you place it in the wrong box, the item will return to its start position.