Let me introduce you to NINAS CD Studio, there you will find custom designs for children. See some examples.
"SAFARI JUNGLE PRINT CRISS-CROSS HALTER TOP AND CROP PANTS, SZ 2-8" for $45.99.
"I'M HEADED TO WOODSTACK 70s INSPIRED HAND PAINTED CROP PANT SET, SZ 2-7" for $42.99.
"BIG OR LITTLE GIRL YO GABBA GABBA POLYMER CLAY BRACELET" for $14.99.
You might find NINA CD Studio, at: