What a good presentation needs. Two to three minutes; the item held up where everyone can see it; the four parts in order (introduce → how you made it → why you like it → close); and every one of the given phrases used at least once. Speak to the class, not to the object in your hands.
Sample answer — a pen stand made from a coconut shell and old newspaper
"Good morning, everyone. Today, I'm going to show you a pen stand I made. This pen stand is made of half a coconut shell, old newspaper, glue made from maida and water, and dried neem leaves. It's brown and round, about ten centimetres across, and it can be used to hold pens, pencils and a pair of scissors on a study table.
First, I started by asking my grandmother for a coconut shell that our kitchen was going to throw away. I washed it, scraped the inside clean and let it dry in the sun for two days. Then, I used strips of old newspaper and homemade maida glue to paste three layers over the outside. The most difficult part was to keep the strips smooth at the curved edge — they kept lifting up, and I had to press them down again and again. After it dried, I stuck dried neem leaves around the rim and gave it one coat of clear varnish.
This pen stand is special to me because it cost nothing at all, and because everything in it was already on its way to the dustbin — a shell, yesterday's newspaper, fallen leaves. It reminded me that 'waste' is often just something we have not looked at properly.
I hope you enjoyed seeing my craft and learning about it. Thank you for your attention."