Hey, I like your shots. Well done.
But I wanted to point out that you're likely treading on thin ice with regard to copyrights here. The toy manufacturer (whoever makes TMNT) owns the copyright to those toys and their image. By taking photos and making posters, you're making a "derivative work" which requires a license from the copyright owner. If the images go no further than the toy store that sells TMNT, then I would guess (no, I'm not a lawyer) that you'd be pretty safe. But by the letter of the law, this is a copyright infringement unless you have license from the manufacturer.
"Beer is proof that God loves us and wantws us to be happy." -- Benjamin Franklin