took my 3.5 yr old daughter to the 2-7 AND the 5-12 exhibits. (you pay 8 euros per section). We did not do any of the explora section, this is separate and extra, we thought it would be too advanced for her. What we chose as perfect. You get an assigned entry time and 1.5 hrs to "explore" at your pace. Time is plenty. She loved both, but did more on the younger kids area (2-7). The water play in this area was closed.
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