2. 2007-2010 years. membrane between hitch and base added. looks like lego modified old molds as still duplo written in stoods. 3. 2012-current time. hook opening has smaller diameter as can be seen at picture: old one at left and new at right. and there is impossible now connect bases over hitch top.
This is why, for over 50 years of LEGO® DUPLO®, we’ve designed our sets to support kids developing in their most important phase of life, working closely with early education and world-renowned experts. We believe in BIG starts for small hands, creating a world of possibilities through having no right or wrong ways to play with our products
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