Has one scorpion embedded in the plastic on one halve.
This was the freshman yo-yo that Small Minds Press debuted in 1996. 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.