Following is a list of materials needed for an instructor-led demonstration and the five activity stations.

Teacher Class Demo

• clear plastic tub, ~1 x 1 ft (~30 x 30 cm) in size, although almost any size plastic tub will work to drop a pebble or marble into it to demonstrate waves
• access to water
• pebble or marble
• roll/stack of paper towels

Station 1: Oobleck Dance

• 0.4 cup (96 ml) water
• 0.6 cups (144 ml) cornstarch
• plastic spoon
• roll/stack of paper towels
• disposable bowl for mixing oobleck, such as a 20-oz (~590-ml) paper bowl; most store-bought disposable paper or foam bowls work well
• stereo with good bass output, such as the AXESS MSBT3907 2.1 Mini Entertainment System at Amazon; suitable stereos are often available at second-hand and thrift stores for low cost
• full-range or subwoofer speakers; often available at second-hand and thrift stores; note that the speaker will not be reusable after the activity since it will be covered with the oobleck mixture (see Figure 1); the previously mentioned example mini entertainment system from Amazon includes speakers
• (optional) plastic bag, to put over the speaker to help keep it clean, although this dampens the signal, resulting in less visual impact
• 1 lawn-and-leaf bag or plastic sheeting to cover the table (placed under the speaker and stereo), such as from this box of 18 39-gallon-size, extra strong trash bags at Amazon
• laptop or other music source device capable of playing low-frequency sound input; either downloaded or streaming, such as the 30-60-hertz bass tests on YouTube
• auxiliary cord, to connect music device and stereo, such as the RCA stereo audio Y adapter cable at Amazon; often available at second-hand and thrift stores

Station 2: Sound Visualization

• stereo or DVD player*; excellent options are often available at second-hand and thrift stores such as Goodwill for a few dollars; choose a stereo or DVD player intended for home entertainment systems; see note below; most phones and computers do not have good enough output for adequate sound wave visualization
• speaker; most sizes work for the activity, but larger speakers (larger than small computer speakers) provide better visualization; make sure the speakers have a connection type that is compatible with your stereo or DVD player
• CD with kid-friendly music
• roll/stack of paper towels
• 2 cups (480 ml) of uncooked long grain rice or bulgur wheat
• 1 cup (240 ml) of water
• 2 large plastic petri dishes with lids, such as 150-mm size, although smaller petri dishes or plastic plates also work fairly well; petri dishes with lids better contain any mess

Station 3: Testing Homemade Speakers

• yogurt cup speaker; either make one on your own, or have groups use the ones they created during the Yogurt Cup Speakers activity
• stereo or DVD player*; often available at second-hand and thrift stores such as Goodwill for a few dollars; see note below
• CD with kid-friendly music
• various objects of different materials and shapes, such as Styrofoam, paper and plastic plates, cups and/or bowls; cardboard; foil; students will use these materials to amplify or distort the yogurt cup speaker sound output
• 12 inches (30 cm) of masking tape

Station 4: Practice Problems

• Seeing Sound Worksheet, one per student; this worksheet guides students through all five stations, including providing the four practice problems for this station

Station 5: How Do Stringed Instruments Make Sound?

• 6 ft (183 cm) of cotton string, cut into 2-foot (61-cm) lengths
• roll/stack of paper towels
• 1 petri dish (with lid), filled halfway with water; a 150-mm diameter plastic petri dish works well
• (optional) 1 ft (~30 cm) guitar wire
• (optional) guitar or other stringed instrument