How I can make a robust 2 'area for a work of art?

I need to create or buy an area of approximately 2 "in diameter. You must be strong enough to support plaster casts or foam filled molded human arms attached to the surface as if radiating from the origin. So optimal, the arms must be well enough attached to the sphere of support from the ground. I am open to any idea of what the material of the sphere, arms, or how to connect the two.

Use a large beach ball (they come in sizes up to 5 feet), place it in a plastic garbage bag, then covered with foil, tape if necessary. place on a round waste paper basket / bin, painting or palette with fiberglass resin and covered with cloth fiberglass; cure, inverted repeat. Build as many layers as you think you need to keep strong. You should sand between coats. Follow all precautions when working with fiberglass resin. Once cured, be able to drill and bolt fittings. You could do paper mache, if your attachments are similar. That would much easier, cheaper and less toxic. It would be like a giant piñata. See video links below:

BioShock – Breaking The Mold Concept Art

Wilton Chocolate Pro Electric Melting Pot $21.00 The Chocolate Pro Melting Pot. It’s easier than ever to melt large amounts of chocolate or confectionery coating! With the Chocolate Pro it takes only minutes! With this you will be able to mold lollipops and fancy dipped-center candies. Dip things like fruits, pretzels, cake, and so much more! Create flavored chocolate sauces for ice cream or silky ganache glaze to pour over cakes. Features: 2.5 …

Fred & Friends Ninjabread Men Cookie Cutters $6.75 Fred & Friends Ninjabread Men Cookie Cutters….

Wilton 2105-4923 24-Cavity Silicone Brownie-Squares Baking Mold $5.50 Bake fun shaped brownies, decorate, and add a stick for a unique brownie pop treat! Wilton Silicone Molds are flexible so removing your treats is easy, and are safe for freezer, oven (up to 500F/260C), microwave, and dishwasher. Stain and odor resistant. This package contains one silicone mold (13″ x 8-1/2″ x 1″) with (24) 1-1/2″ x 1-1/2″ cavities and one design. Brownie mix and sticks sold separa…

Magic $3.86 Thirty-five years as a justifiable rock musician allows Bruce Springsteen an opinion on the state of over-the-air radio, and he takes it–and takes the medium to the woodshed on the ruthless “Radio Nowhere.” The opening smash sets the tone, with the ageless Boss wondering, “Is there anybody out there?” before imploring, “I just want to hear some rhythm.” Then, with E Street Band in tow, Springstee…

Bob Mould $5.77 Bob Mould’s first solo album in six years (following the demise of Sugar) is unremittingly dark, direct, and brilliant. Entirely self-written, -performed, and -produced, the 11-song collection opens with Mould bellowing that he’s “sick of myself, sick of everything I am” and ends with: “If I couldn’t hold you I’d end it all.” That last song is called “Roll Over and Die,” if that helps provide a se…

Thar They Blow $14.13 …

Silikomart FruitsSemifreddi Relief Mat, 2 Inch $89.95 Eric Del Castillo Roberto Canedo Maria Cardenal…

Mold Making and Cold Casting [VHS] $34.99 The instructional sculpture video, “Mold Making and Cold Casting”, demonstrates the detailed processes of creating a clay model or pattern, two flexible molds including the mothermold, and two different final cast abstract sculptures. The artist and college art educator, Michael G. Booth, teaches how to make resin poured (cold casted) sculptures from start to finish including the entire mold makin…

Exploring Art Clay Silver, Part 1 [VHS] $29.95 Art Clay Silver is a moldable clay that becomes pure (99.9%) silver when fired. In its wet stage, you can shape it into any form imaginable by rolling, sculpting, molding, stamping or extruding! After drying, you can sand, file, engrave and even drill your pieces! Firing is easy using an electric kiln, a butane torch, or even a gas stovetop! Art Clay Silver is versatile – it can be added to a vari…

3M R6211 Low-Maintenance Half-Mask Organic Vapor, P95 Respirator Assembly, Medium $25.95 PAINT SPRAY & PESTICIDE RESPIRATOR Low profile for visibility and to accommodate safety glasses Lightweight to reduce pressure on neck and nose Soft pliable facepiece for comfortable fit Easy breathability Comfortable, lightweight, easy-to-adjust Low maintenance, only cartridge and prefilter to replace Easy-to-clean between use Peggable card…