This is a replacement lid for a 1kg Kraft or Kirkland Signature peanut butter jar that has a square slot fitting 1x1 Duplo blocks. It's a great dexterity toy for children to play with. Use it with Duplo, MEGA BLOKS, or whatever fits.
Printing instructions:
Child safety warning:
Links
If you like turning your old peanut butter jars into fun games, take a look at my other lids:
Notes:
The author remixed this model.