You can make a birdbath,fairy gnome garden,use them when you weed for easy transport or if you plant flowers you can put some soil in them as well for easy transport.
Depending on the sizes you could use them underneath potted plants for drainage, as shoe mats out in the garage, as trays for small craft projects or as a work area for painting to set your bucket, roller pan etc . You could also use them for lap trays at a summer event or donate them to a summer camp so the kids can use them to sit on. Depending on your area they can most likely be recycled too in the event that you just can't use all of them.
@MN Mom THAT WOULD BE MY IDEA
MN Mom has some brilliant ideas. I was also going to suggest using them as drip trays, but she beat me to it! Another idea would be to use them as moulds for stepping stones.
just a thought, how about a room divider? painted or bit cut out to make a pattern. attached with hinges and placed on wheels. okay just a thought.
You can cut them up into different 3D pieces & make Flowers or Butterflies & Dragonflies for a Garden. Many uses for plastic-including the Bottles & Soap Jugs too. Good luck whatever you choose to make!
Could you cut out the center and use the outer rim for picture frames.
@K bain Thank you I will give that a try.