This can employ even the youngest adventurer for quite a while. A board or box lid. Double sided tape, on to which you put sticky back plastic (the kind used to cover school books), sticky side up of course!
All you need now is a box of little thingies (anything at all) and an enthusiastic baby! Off they go improving their fine motor skills.
Creative messy play toddler classes for babies, toddlers and preschoolers in Cheltenham.