Developmental/educational toys for 18mths - any recommendations

[Trunkella]

Thoroughly recommend this:
www.amazon.co.uk/Melissa-Doug-Colourful-Extra-Thick-Construction/dp/B00272N8GW/ref=asc_df_B00272N8GW/?hvlocphy=1007221&linkCode=df0&hvptwo&psc=1&psc=1&hvnetw=g&hvadid=311044052101&hvpone&hvlocint&th=1&hvpos&hvdev=m&hvdvcmdl&hvqmt&tag=mumsnetforu03-21&hvtargid=pla-433908884784&hvrand=11705020907604472747

Any other toys that have really taught your child something?