Does your nephew like to draw ?
My granddaughters do, so I made them sketch pencils with really fat leads ... about 5 mm or so thick, which are available in colors and black.
They seem to be a hit. . But the kid needs to have some manual dexterity to change the leads without breaking them
I used the Berea Woodworker's Pencil (CBP-1206) which I like better than the kit that has "sketch" in the name.
This one has no clip, which is a plus IMO. . I make it without a centerband also ... just a little mod that improves appearance.