got the start of a good intro tutorial, but its lacking some good, simple exercises

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diff --git a/doc/tutorials/intro/11.hot_and_cold_inlets.pd b/doc/tutorials/intro/11.hot_and_cold_inlets.pd
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+#N canvas 205 66 683 545 12;
+#X obj 19 243 +;
+#X floatatom 19 272 5 0 0 0 - - -;
+#X msg 19 179 1;
+#X msg 36 215 5;
+#X text 11 56 For most objects in Pd \, the leftmost inlet is the "hot"
+inlet. This means that it will output something whenever it receives
+data on the "hot" inlet.;
+#X text 12 116 All other inlets are generally "cold" inlets \, which
+merely store the data they receive until input on the "hot" inlet causes
+the object to do its thing.;
+#X text 85 216 2) click this and there will be no new output;
+#X obj 181 412 +;
+#X floatatom 181 441 5 0 0 0 - - -;
+#X msg 84 337 1;
+#X text 15 305 Try a number of different combinations to see for yourself:
+;
+#X text 215 405 <-- "cold" inlet;
+#X text 29 405 "hot" inlet -->;
+#X msg 124 337 2;
+#X msg 164 337 3;
+#X msg 234 337 4;
+#X msg 274 337 5;
+#X msg 314 337 6;
+#X text 85 248 3) now click the [1( message box \, and you get a new
+output;
+#X text 17 462 Notice that the number is stored in the "cold" inlet
+until you change it. For example \, if you click [4( \, then click
+[1( \, [2( \, and [3( \, you will see that 1 \, 2 \, and 3 are all
+added to 4;
+#X text 85 184 1) click this first \, and [+ ] immediately outputs
+a 1;
+#X obj 6 8 cnv 15 400 40 empty empty hot_and_cold_inlets 20 12 0 24
+-228992 -66577 0;
+#X connect 0 0 1 0;
+#X connect 2 0 0 0;
+#X connect 3 0 0 1;
+#X connect 7 0 8 0;
+#X connect 9 0 7 0;
+#X connect 13 0 7 0;
+#X connect 14 0 7 0;
+#X connect 15 0 7 1;
+#X connect 16 0 7 1;
+#X connect 17 0 7 1;