Step 1: Get the baby making materials.
Pink Felt - At Joann Fabrics, an 8 by 11 piece of pink felt is 25 cents.
Black Felt - You won't need a full square, just some scrap will do. If you don't have any, sharpie?
Polyfill - Used for stuffing. If you don't have any, you can use some stuffing from an old pillow or stuffed animal which reminds you of your ex.
Heat n' Bond (optional) - It is mainly used for attaching fabrics (like the eye) to others. It's kind of like an iron on transfer. If you don't know how to use this, ask the people at Joann's (where I learned). Honestly, you don't really need it. It just makes it easier. You could use thread and needle to sew on the eye.
Thread - Preferably pink.
Needle - Preferably pointy.
Pins - Preferably not the ones used for dissections.
Hot glue and gun - It's the easy way out.
Old Jumpdrive - Preferably without the housing (case) it came in. Those things break off too easy. If for some unfortunate reason your jumpdrive is still in tact, just remove the casing by sliding down a screwdriver in the side (careful!), and popping it off.
Iron - If using heat n' bond