Hi Sabrina,
Here it is
https://drive.google.com/file/d/1vXsjeLMjQd8TqAmshAVR22UfW0zC8Ic0/view?usp=shari...
Thanks! A smart application, I can see the educational applications, and good sound effects for each thing. I would echo the suggestions of others of allowing you to drag pieces once you've placed them, and having an 'Undo' button rather than depending on the trashcan button, and see-saws and pendulums would be brilliant additions.