New Kids On The Block   Spectra Star Rad Rollers Marbles  ( only 4 shown ) 1990

I believe these are acrylic or plastic? 

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Condition: Good for age:    Please check pictures.  I will try to note any obvious flaws.  Sold as is / as pictured. 

Shipping:  Includes delivery tracking.  Shipped between cardboard in mailing envelope.  Approximate weight with packaging is 4ozs - 12ozs.