So ... you need/want a mini percussion shaker and don't want to spend $7-8 on an egg ($2 for a pair on Amazon)? You tried making your own egg using parts from your little Brother's Easter basket, but ended up covering the front row in rice when it came apart? Well my Friend, I have a solution for you.

1 6oz metal can ($0.50 at the Supermarket)
Rice
Superglue
Side cutting can opener. These are also called "safety" or "Smooth Touch" can openers.

Step 1: Empty, Fill, Glue

Open the can.
Consume or save the contents of the can (I used mine in Chili).
Wash out the can (Removal of label is optional).
Fill can with desried amount of rice.
Glue lid back onto can.

You now have a Fixed Mini Percussion Shaker.

Step 2: Make an Adjustable Version

What's that? You are undecisive you say? You might want more rice in time? Or less rice? Or dried beans? Or ball bearings?

Well ok little buddy! Grab yourself a nut and bolt (which work together obviously), a small scrap of wood, and some epoxy.

Step 3: Drill the Lid

Find the center of your lid and drill a hole big enough for the bolt to fit through. I used a shop made center finder and a drill press, but you could use math and a hand drill.

Step 4: Drill the Wood

Find the middle of the width. I used an adjustable square, but you could use a tape measure or any ruler.
Length doesn't matter because we are cutting it to fit inside the can.
Drill a hole just large enough and deep enough for the nut.
Switch to a smaller bit, which is the size of your bolt, and drill the rest of the way through.

Step 5: Layout the Size and Shape of the Wood

Temporarily screw the lid and wooden piece together so you can transfer the lid diameter to the wood.

Step 6: Shape the Wood to Fit Inside the Can

I used a bandsaw and an oscillating belt sander. You could use a hand saw and any sander, or just a sander, or just sandpaper even.
I snuck up on the line and kept testing the fit. Worst case scenario, you have to make a new piece.

Step 7: Epoxy Time

Mix up a small amout of epoxy. You could probably use superglue, but I have epoxy.
Glue the nut into the larger hole in the wood.
Glue the wood into the can. Make sure you recess (I wish my day job had recess) it enough for the lid to fit back on flush.
Clean up any excess epoxy that might hinder the lid fitting on once cured.

Step 8: Fill and Cap

Fill this baby up! I used rice. You can use whatever you want, but Jello would make a mess. You have been warned.
Put the lid on the top.
Tighten the screw.
Shake.

Don't want to have to use a screwdriver every time? Use a slotted head screw wide enough to open with a dime. Another option would be to use a thumb screw.