There's a few other versions of this on instructables, and even a company making them to buy (for a fairly ridiculous price), I looked at them and came up with a way of doing it with what tools I have. It didn't come out as great as I'd hoped mainly because I only started making it a week before valentines and have not much spare time or space to do stuff at the moment so it was a bit rushed and thrown together, also various ideas I had for doing things didn't work out and I had to change the plans to accommodate the cock ups as I went along.
I designed it up in sketchup first just to check I had the measurements right for how it would look, you could just do this on paper but I'm not too good with a pencil so sketchup works quicker for me.
I based it around a 3-4-5 triangle to make the measurements easier, (30-40-50 mm), with the semi-circle of radius 15mm at the end to make each half of the heart shape.
I know it isn't quite perfect, there are gaps, but I fully intend to straighten them out at some point, I was rushing to get it somewhat finished by valentines.
a couple of photos (I used one of me and one of my son, but you should probably choose your own photos if you make this)
drill, in a drill press type thing
dremel-alike rotary mutitool
wood glue and super glue
some masking tape
Tools that would have made it a lot easier if you have them:
Scroll Saw (or band saw)
Step 1: Get Wood
Cut 4 pieces, I then used a block plane to get them the same width, but this really isn't necessary as your going to be sanding them to size later anyway, so don't bother.