If you want to perform a little initiative to your children you may select wood Pallet tree house project for children. Wood pallets for children are very completely happy if you make a DIY Pallet tree house.
Use an old pallet to make a vertical herb garden! Cheap, easy and beautiful! Just make sure to find out how the pallet was treated so you're not planting in harmful chemicals! And- u can write the name of the herbs on the wood!