HI Faye
you have my every sympathy - I had SPD with both my boys and it's not fun!
Anyway - here's just one suggestion for you - hopefully other people will have their brains in gear and can contribute more!
Big bucket of water - big paintbrush (wallpaper paste brush even better!) Let Shay paint the house, path, patio, decking
Keeps Toby quiet for ages!
HTH!
x