What is the Professional Hobby Center?

Looking at the official Transcience Parts & Supplies list you may have noticed an interesting item:

Item No. 132
Professional Sea-Monkey Hobby Center . . . $10.00
Created for AVID Sea-Monkey fans or as a GREAT GIFT. The Hobby Center comes with a Sea-Monkey aquarium PLUS more than $13.00 in assorted supplies including the complete Sea-Monkey hatching and growing system among all the extras. An INCREDIBLE "buy" available ONLY through THIS offer!!!

You probably wondered what all you actually get. I recently saw a vintage Professional Hobby Center originally purchased in 1976 for sale on eBay for $59.99. Lets see what is in it:

Looks like an Ocean Zoo with a binocular cover,  a classic castle top cover, an aqua-leash, a plastic dropper, a magnifying glass, an official Sea-Monkey handbook, an airstone, a couple of feeding spoons, the lid to the binocular cover, two packets of Water Purifier, two packets of Sea-Monkey eggs, a packet of Living Plasma, and two packets of Growth Food. The set also includes the original box from Transcience that it was mailed in. I don't know if the set is compete, even the seller can't say for sure.

Contrast this to what came to a buyer in 2010 who purchased a Professional Hobby Center from Transcience:

Lets see... an Ocean Zoo with a binocular lid (no castle top cover), A basic kit (consisting of Packet 1, &  Packet 2,), packet 4 (Plasma III), Growth Food, Super Food, Cupid's Arrow, and a feeding spoon. Not nearly as much as in 1976 but still a bargain for only $10.

The official Sea-Monkeys web site no longer lists this item, so I don't think it is still available. I recently sent off an order to transcience for an Executive Sea-Monkeys® set and I included a note asking if the Professional Hobby Center is still available. I await the answer.