Cute little cake that opens up. About 4 inches tall. Click either picture for an enhanced view. Heather Goldminc, a Canadian artist, created the world famous Blue Sky Clayworks line of collectible ceramics. Heather GoldmincÂ’s Blue Sky Clayworks line of collectible creations are cute, clever, colorful and whimsical. Clayworks please the eye and delight the senses while expressing the joy and wealth of life in simple everyday things. Blue Sky ceramics are adorable and affordable. CourtneyÂ’s Candles is your Heather Goldminc Clayworks Blue Sky Superstore, stocking every available Clayworks item and maintaining an inventory of over 9000 ceramics.