My 3-year-old can actually click these together herself, which is huge since most stacking toys need me to press them. They're 1 3/4 inches tall so they don't tip over mid-tower, and we've built some pretty ridiculous structures.
Steven★★★★★
The big knobs make these so much easier for little hands to grip than the skinny pegs we had before. My kids stack them into towers for almost an hour, and they hold together well enough that the whole thing doesn't topple every two seconds.
Daniel★★★★★
My 3-year-old can actually get these pegs to click together on his own, which surprised me since most stacking toys frustrate him. The big knobs make them easy for little hands to grip, and we've built some impressively tall towers already.