A yo-yo with a real seahorse imbedded into one yo-yo halve. Very unusual.
Small Minds Press debuted in 1996 with the release of a yo-yo embedded with a scorpion. Over the next several years, the company released other novelty yo-yos with unusual embedded objects like the following:
Of interest... To see all filled yo-yos in this museum, in the left panel, select Exhibits. In the right pane, in the Name/Model field, type filled, then select Browse.