These are the cutest worms with little smiley faces, the tiniest is adorable! Instantly appealing made from quality plastic, segmented and flexible so beautifully tactile. Seventy two worms made up of six sets of twelve in vibrant colours: Yellow, Blue, Orange, Green, Red and Purple. Each set has three worms in each approx length: 4 " 96 mm, 3 " 71 mm, 2 " 45 mm and 1 " 25 mm. The enclosed leaflet gives some ideas of use, "Getting Started"( free play ), "Sorting Activity"( starting with 2 colours in 2 sizes adding more after completion ), "Patterning Activity" ( simple colour or size patterns becoming increasingly harder ), "Measuring Activity" (measure objects, how many worms long? ) and "Creative Worms Activity" ( 3-6 players: worms inside a bag, take turns to pick one, keep if it matches yours )" . Our container was hexagonal and smaller than I imagined. This number of worms don't take up much space! It's fiddley getting the worms out as the opening is quite small, unless tipped upside down and shaken. I've found a sandwich box for ours, much easier to access the contents. There is a pack of 'Worm Activity Cards' available, specifically for use with this set. My little one enjoys sorting:size/colour/amounts, hiding, washing, talking to, measuring, comparing, imaginative play, filling containers:volume/capacity, bath play, transporting, burying in sand, selling, wrapping in paper/foil/tissue, naming them, devising stunts, dropping them through cardboard tubes, cooking and printing with these worms and they don't mind one bit! This has proved to be a wormingly wonderful purchase!