Science experiment reflection- Estimation

I like this experiment since i can randomly estimate the weight of the object that im supposed to weigh, making this experiment more relaxed than any other. Though, how relaxed this experiment is, i realised that i cant estimate well. For the heaviest object, i thought that i was the lightest. Well anyway, estimation is not a good thing to do since i cant really estimate well, causing many experiments to screw up and also, many people can get really confused with what im doing.