Minions Mystery Packs All 6 with cheat codes MEGA BLOKS Despicable Me

I picked up these because they had a sexual buy one get one 40% off at Toys R Us. Plus a new from previous Mega BLOKS mystery packs, you could look at the serial numbers and avoid duplicates. Bought 6 boxes and got all 6 figures. Figures look cool and each comes with the 2x4 brick with serial number. However, I don't understand why they made it so difficult  to attach the arms and legs. Virtually impossible for a kid. My hands were sore afterwards a I'm not a weakling. Very disappointed but then again, what was I expecting!