He can carry one or two or three (depending on the nuts' sizes) in its mouth and throat. Also, at least two more in expandable "pockets" on the outside of its throat.
The jay carries them away and hides them for later - just like a squirrel.
If you're thinking about buying a child a pair of binoculars for Christmas, that's a wonderful, lasting gift!! However, please avoid buying a toy pair, which has terrible performance, usually breaks right away, and sours the child on pursuing other "nature stuff" in the future. Keep these criteria in mind;
1. Choose binoculars where the distance between the eyes ("IDP") adjusts down to 50-55 mm. 2. Steer clear of choosing extra-high magnification, and toward a wider field of view, so the child can see a wider area. 3. Avoid a compact model made for an adult's hands. These almost always have smaller focusing dials.