Tiff Tseng has some wonderful prototypes of 3D printed ATtiny sockets for creating circuits with micro-servos!
Five LEDs, 3x AAA battery pack with ON/OFF switch, and ATtiny85
Six LEDs, 3x AAA battery pack with ON/OFF switch, and ATtiny84
RGB LED, coin cell battery holder, ON/OFF switch, ATtiny 85
LED, micro servo, 3xAAA battery pack, ATtiny85
Neopixel strip, 3xAAA battery pack, ATtiny85