To build large walls (like a castle), don't connect them one-by-one. Instead, build a layer of 10x10 Bunchems on a table, then place a heavy book on top for 10 seconds. This flattens the micro-hooks, creating a brick-like rigidity.
A PDF guide ensures that if the physical pamphlet is lost, parents can easily find it online, ensuring the toy doesn't go to waste. bunchems instruction guide pdf