An introduction to ScratchJr and a web-based alternative. Click on the blue blocks to cycle through the different movement blocks or show/hide. Click on numbers below to change number of steps. Click on red end block to toggle 'forever'. Click go flag to run program, cycle though backgrounds with picture button, add name with ABC button, click on cat to change sprite. Press i to show instructions being executed, D to add date, N to remove name. Press 1-5 for quick access to backdrops with targets.
Some backgrounds now have 'target' sprites that trigger action - football screen is the easiest, look also at the moon, snow slopes and underwater. Children program their characters to bump into other characters to trigger action. You could also use the sun sprite to do the sunset activity from the ScratchJr resources.