We are using all old toys to make a number of busy boards for our son. We will also add an old tap, socket with plug, as he loves playing with those. Many of his musical books have come apart so we will add the top cover so he can still use the buttons for sounds. All you need is wood & glue/drill. This will also help declutter and as we are making a few we can change them around each week. You can literally add anything you already have and it will keep little ones entertained for hours!