To Connect Straws:
The small end goes into the large end. Using your finger, press down the small end. 
Pinch the sides together. 
Gently push the small end into the large end (until the bend meets the other straw). You can also cut a lengthwise slit through the small end of one straw, then squeeze the cut end and push it inside the large end of the second straw. 

Tetrahedron (Pyramid) – 12 straws
Connect 3 straws (total of 4 triangles). 

Bend each straw to a 60degree angle. 

Connect the 1^{st} and last straws. 
Tape on each end of the sides keeping 3 triangles to each point – 12 pieces of tape used. 
Hexahedron (Cube) – 24 straws
Connect 4 straws (total of 6 squares). Bend each straw to a 90degree angle. Connect the 1^{st} and last straws. 
Tape on each end of the sides keeping 3 squares to each point – 16 pieces of tape used. 
Octahedron – 24 straws
Connect 3 straws (total of 8 triangles). Bend each straw to a 60degree angle. Connect the 1^{st} and last straws. Tape on each end of the sides keeping 4 triangles to each point – 8 pieces of tape used. You will have two of the shape pictured. 
Tape the matching sides together. 
Dodecahedron – 60 straws
Connect 5 straws (total of 12 pentagons). Bend each straw to a 72degree angle. Connect the 1^{st} and last straws. 

Icosahedron – 60 straws
Connect 3 straws (total of 20 sets). Bend each straw to a 60degree angle. Connect the 1^{st} and last straws. Tape on each end of the sides keeping 5 triangles to each point – 10 pieces of tape used. You will have two of the shape pictured. 
On each of the sides, tape another triangle – 10 pieces of tape used. You will have two of the shape pictured. 
Interlace the two shapes and tape the matching sides – 20 pieces of tape used. 
