How about these? Lots of functionality from both the 08Mx and this particular daughter board, which offers the following possibilities:
Motherboard has download socket, download resistors, reverse protection diode and a 100uF smoothing capacitor for driving things like servos. Stress relief for PP3 style battery clip.
1. Potentiometer input on ACD4, push to make on input 3, use internal pull-up or pull down on board, stress relief holes for off-board switch mounting.
2. LDR/Thermistor input on ADC4 with resistor for making a potential divider
3. Holes and resistor for DS18B20 temp sensor
4. Holes (0v, sig, +ve) for ebay special/rapid electronics PIR module
5. Option to trigger events with modified piezo sounder on input 3
6. option to cut the LED panel to remote mount 3 LEDs (usually 1 each R,G,B,) but holes to use a single RGB LED provided too (CC).
7. Current limiting resistors if you want
Daughter board piggybacks onto the motherboard below, either via header pins and socket, or soldered direct. User chooses.
I use them extensively with my pupils, year 8 and upwards. Lots of other more advanced boards available too, including stuff for the 14M2 and the 20M2. Contact me off-forum for further details.