This activity is to practice the infinitive "want to" grammar point. There's a lot of room for variation, but the core of it is to have students justify their choices by using "want to." Here's how I do it.
First, I tell the students that I'm giving them a free plane ticket for a vacation. But the catch is that I get to choose where they go. I give each student in the class a number. From 1 to 7, for example. Then I write their vacation destination on the board, which depends on their number. For example:
1 - Hawaii, 2 - Hokkaido, 3 - France, 4 - Hong Kong, 5 - Okinawa, 6 - Egypt, 7 - The Moon
I ask the students to write their destination on their worksheet. I tell them that they can put 4 items in their suitcase. I say that me and the JTE have a store where we'll give you the objects, but you have to tell us why you're taking it. I write the explanation sentence on the blackboard: "I'll take ____________ because I want to ______________." For example, "I'll take a camera because I want to take pictures." After that, the student can go back to their seat, write down the first item and what their reason was, and then come back up and return the card. Once they have four items, they're finished.
It's good to go over a lot of example sentences before starting the activity so the students can think of lots of reasons. There are some example sentences on the second page of the worksheet, so you might want to review them. Remind the students that the verb after "want to" should be in plain present tense - "I want to swim" instead of "I want to swimming."
I try to print two copies of the items page but you might want to print three if it's a larger class. Feel free to add or alter items on the cards.