Using the idea from thing 244007, I created a much smaller blowfish, holding 7 pencils. Print time was less than 3 hours, .3mm layer height, 10% infill, made in PLA. At 30% completion, I paused the print and added sand to the print to weight it down, as 1st graders will be using mine. Scale it up a bit if you want it to hold pens.